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Electric Field Question

  1. Oct 5, 2009 #1
    When finding the magnitude and direction of an electric field, how do you know if the direction is left or right?
     
  2. jcsd
  3. Oct 5, 2009 #2
    It depends on the convention you're using. If you take right as positive and left as negative, then that is how you know if it is left or right.
     
  4. Oct 5, 2009 #3

    berkeman

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    Staff: Mentor

    The E field points in the direction that a positive charge will be accelerated in via F=QE.

    Since "opposites attract" and "likes repel", if you have a +Q on the left and a -Q on the right, with some test charge +q between them, which way will the test charge +q be pushed? Which direction is the Electric field pointing in this case?
     
  5. Oct 5, 2009 #4
    test charge will be pushed right, electric field is pointing to the right

    right...?
     
  6. Oct 5, 2009 #5

    berkeman

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    Staff: Mentor

    Yep!
     
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